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Another beam subdivision issue

From: Urs Liska
Subject: Another beam subdivision issue
Date: Wed, 25 Nov 2015 16:34:48 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0

After completing my patch for #4664 I tested beam subdivision with
another example and was unpleasantly surprised that the other example
produced a wrong result.

This example should render the subdivisions with a regular alternation
of two and one beams. Instead all beam subdivisions show two beams
(first attachment):

\relative c' {
  \set baseMoment = #(ly:make-moment 1/16)
  \set subdivideBeams = ##t
  c64 [ \repeat unfold 30 c c ] 

After initial shock I investigated and found out that this is *not* due
to my patch but to commit 0382ed88 where Carl modified some behaviour of
his patch for #4355 in 8fa2d858.

After partially reverting 0382ed88 the example renders correctly as in
the second attachment. There I have two groups, one with a manual beam
exposing the new behaviour of my current patch.


Carl, can you tell me what you intended with that adjustment? I can see
two possible purposes:
- you thought the behaviour with alternating beam numbers is wrong
- something else I can't see from here.

If it is the first one I would like to partially revert that change to
the behaviour of your original patch for 4355. In the other case please
tell me what you were after.


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Attachment: document.png
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